Audio unit and method for generating a safety critical audio signal
First Claim
1. An audio unit, connected or connectable to a safety-critical apparatus, or integrated or integrable in said safety-critical apparatus, said audio unit comprising:
- a driver unit, connected or connectable to an acoustic output unit, and arranged to generate an analog audio signal in response to a request from said apparatus,drive said acoustic output unit, andgenerate an acoustic signal for a user of said apparatus;
a detection unit, wherein said detection unit is arranged to detect said audio signal; and
an alert unit, connected to said detection unit, and arranged to generate an alert signal in response to said request if said detection unit has not detected said audio signal, wherein said audio signal comprises user audio for said user and detection audio for the detection unit;
a first memory unit containing first audio data representing said user audio;
a second memory unit containing second audio data representing said detection audio; and
a mixer unit for blending said user audio with said detection audio in order to generate said audio signal.
24 Assignments
0 Petitions
Accused Products
Abstract
An audio unit, connected or connectable to a safety-critical apparatus, or integrated or integrable in the apparatus, is proposed. The audio unit may comprise a driver unit, a detection unit, and an alert unit. The driver unit may generate an analog audio signal in response to a request from the apparatus, to drive an acoustic output unit and thereby generate an acoustic signal for a user of the apparatus. The detection unit may detect the audio signal. The alert unit may generate an alert signal in response to the request if the detection unit has not detected the audio signal. It can thus be checked whether the acoustic signal is generated. A method for generating a safety critical acoustic signal is also described.
-
Citations
20 Claims
-
1. An audio unit, connected or connectable to a safety-critical apparatus, or integrated or integrable in said safety-critical apparatus, said audio unit comprising:
-
a driver unit, connected or connectable to an acoustic output unit, and arranged to generate an analog audio signal in response to a request from said apparatus, drive said acoustic output unit, and generate an acoustic signal for a user of said apparatus; a detection unit, wherein said detection unit is arranged to detect said audio signal; and an alert unit, connected to said detection unit, and arranged to generate an alert signal in response to said request if said detection unit has not detected said audio signal, wherein said audio signal comprises user audio for said user and detection audio for the detection unit; a first memory unit containing first audio data representing said user audio; a second memory unit containing second audio data representing said detection audio; and a mixer unit for blending said user audio with said detection audio in order to generate said audio signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An audio unit, connected or connectable to a safety-critical apparatus, or integrated or integrable in said safety-critical apparatus, said audio unit comprising:
-
a driver unit, connected or connectable to an acoustic output unit, and arranged to generate an analog audio signal in response to a request from said apparatus, drive said acoustic output unit, and generate an acoustic signal for a user of said apparatus; a detection unit, wherein said detection unit is arranged to detect said audio signal; and an alert unit, connected to said detection unit, and arranged to generate an alert signal in response to said request if said detection unit has not detected said audio signal, wherein said audio signal comprises user audio for said user and detection audio for the detection unit, and wherein said driver unit comprises; a memory containing audio data representing a blend of said user audio and said detection audio; and a player unit for generating said audio signal from said audio data without blending said user audio with said detection audio. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. A method for generating a safety-critical acoustic signal for a user of an apparatus, comprising:
-
receiving an audio request from said apparatus; generating an analog audio signal in response to said audio request, thereby driving an acoustic output unit to generate said acoustic signal, wherein said audio signal comprises user audio for said user and detection audio for the detection unit; detecting said audio signal; generating an alert signal in response to said audio request if said audio signal is not detected, storing first audio data representing said user audio; storing second audio data representing said detection audio; and blending said user audio with said detection audio in order to generate said audio signal.
-
Specification